Mecklenburg County
Common Code Defects
Residential Building
Code Defects
•
•
Ridge beam not sized correctly to create Cathedral Ceiling.
Engineered floor trusses and damage repairs.
• Engineered roof trusses and damage repairs.
Code Description
Section R802.3.1 Cathedral ceiling.
“When ceiling joists and rafter ties are omitted and the rafters are used to
create a cathedral ceiling, rafter ends shall be supported on bearing walls,
headers or ridge beams designed in accordance with accepted
engineering practice. Rafters shall be attached to the support in
accordance with Table R602.3(1). Ridge beams shall be capable of
carrying the imposed roof loads and shall be supported by structural
elements which transmit the loads to the foundation.”
Section 802.10.2 Trusses (Roof and Floor)
“Wood trusses shall be designed in accordance with accepted engineering
practice. The design and manufacture of metal plate connected wood
trusses shall comply with ANSI/TPI 1. Trusses shall be braced to prevent
rotation and provide lateral stability. Truss members shall not be cut,
notched, drilled, spliced or otherwise altered in any way without the
approval of a registered design professional. Alterations resulting in the
addition of load (e.g., HVAC equipment, water heater) that exceeds the
design load for the truss shall not be permitted without verification that the
truss is capable of supporting such additional loading. If altered or cut, a
truss repair design must be obtained from a professional engineer
verifying the proper repair method to be used.”
Possible Options:
In this situation, the ridge beam for the cathedral ceiling must be sized sufficiently
to be capable of carrying the imposed roof loads and not push the wall system
outward.
When roof and/or floor trusses are used, trusses shall be braced according to
their appropriate engineered design. (Please view the attached drawings and
nailing schedule).
Mecklenburg County
Common Code Defects
Disclaimer: There may be other ways to comply with the Code. If so,
you are not required to use this method to comply with the Code. You
may want to investigate other options, or consult with a design
professional identifying an equally code compliant solution.
FASTENER SCHEDULE FOR STRUCTURAL MEMBERS
DESCRIPTON OF BUILDING
ELEMENTS
Joist to sill or girder, toe nail
1”x6” subfloor or less to each joist, face nail
2” subfloor to joist or girder, blind & face nail
Sole plate to joist or blocking, face nail
Top or sole plate to stud, end nail
Stud to sole plate, toe nail
Double studs, face nail
Double top plates, face nail
Sole plate to joist or blocking at braced wall
panels
Double top plates, minimum 48-inch offset
of end joints, face nail in lapped area
Blocking between joists or rafters to top
plate, toe nail
Rim joist to top plate, toe nail
Top plates, laps at corners & intersections,
face nail
Built-up header, two pieces with ½” spacer
Continued header, two pieces
Ceiling joists to plate, toe nail
Continuous header to stud, toe nail
Ceiling joist, laps over partitions, face nail
Ceiling joist to parallel rafters, face nail
Rafter to plate, toe nail
1” brace to each stud and plate, face nail
1”x6” sheathing to each bearing, face nail
1”x8” sheathing to each bearing, face nail
Wider than 1”x8” sheathing to each bearing,
face nail
Built-up corner studs
Built-up girders and beams, 2-inch lumber
layers
2” planks
Roof rafters to ridge, valley or hip rafters:
Toe nail
Face nail
Rafter ties to rafters, face
NUMBER AND TYPE
a,b,c,d
OF FASTENER
3-8d
2-8d
SPACING OF
FASTENERS
----
2 staples 1 ¾
2-16d
16d
2-16d
3-8d or 2-16d
10d
10d
3-16d
-16” o.c.
--24” o.c.
24” o.c.
16” o.c.
8-16d
--
3-8d
--
8d
2-10d
6” o.c.
--
16d
16”o.c. along each
edge
16”o.c. along each
edge
---------
16d
3-8d
4-8d
3-10d
3-10d
2-16d
2-8d
2 staples, 1 ¾
2-8d
2 staples, 1 ¾
2-8d
3 staples, 1 ¾
3-8d
4 staples, 1 ¾
10d
10d
2-16d
----24” o.c.
Nail each layer as
follows: 32”o.c. at
top & bottom &
staggered. Two
nails at ends & at
each splice
At each bearing
4-16d
3-16d
3-8d
----
Mecklenburg County
Common Code Defects
Mecklenburg County
Common Code Defects
Mecklenburg County
Common Code Defects
End Notes
North Carolina State Building Code
Residential Code 2002 Edition
Publication Date: September 2001
Copyright 2001 by International Code Council
Published in cooperation with:
Southern Building Code Congress International, Inc. (SBCCI)
International Residential Code for One and Two Family Dwellings
Commentary-Vol I
Publication Date: September 2002
Copyright 2002 by International Code Council, Inc.
Published in cooperation with:
Building Officials and Code Administrators International, Inc.
International Conference of Building officials
Southern Building Code Congress International, Inc.